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Q: Fachverband Quantenoptik und Photonik
Q 38: Poster IV
Q 38.1: Poster
Mittwoch, 13. März 2024, 17:00–19:00, KG I Foyer
New Magnetically Levitation System for Magnetometry — •Changhao Xu1,2, Wei Ji1,2, and Dmitry Budker1,2,3 — 1Helmholtz Institute Mainz, Mainz, Germany — 2Johannes Gutenberg University, Mainz, Germany — 3Department of Physics, University of California at Berkeley, Berkeley, California 94720-7300, USA
In this work, we attempt to provide a novel magnetometer operable at room temperature. We firstly achieved stable levitation of magnets smaller than 1mm in size at room temperature using diamagnetic levitation techniques. For the levitated magnets, their rotational degrees of freedom are sensitive to external magnetic field strengths with low dissipation. Through the application of optical lever techniques, we have realized high-sensitivity measurements of the rotational dynamics of the levitated magnets. After suppressing factors such as magnetic field noise, air fluctuation, laser-induced thermal damage, and system vibrations, we have currently achieved a sensitivity of 1pT/Hz^1/2 for magnets with a size of 0.5mm.
Keywords: levitated magnet; magnetometry; precision measurement